Portable speaker system



FIG. 1 illustrates a front-side perspective view of a portable speaker system showing the new design;

FIG. 2 illustrates a top-rear perspective view thereof;

FIG. 3 illustrates a front elevation view thereof;

FIG. 4 illustrates a rear side elevation view thereof;

FIG. 5 illustrates a top plan view thereof;

FIG. 6 illustrates a bottom plan view thereof;

FIG. 7 illustrates a left elevation view thereof; and,

FIG. 8 illustrates a right elevation view thereof. 

CLAIM The ornamental design for a portable speaker system, as shown and described. 